Greater Castle Forest Weather Forecast

Today 31 Aug
- 75
- 99
Hot
Tue 1 Sep
- 75
- 98
Hot
Wed 2 Sep
- 75
- 99
Hot
Thu 3 Sep
- 75
- 99
Slight Chance Thunderstorms
Fri 4 Sep
- 75
- 99
Hot
Sat 5 Sep
- 75
- 98
Hot
Sun 6 Sep
- 75
- 98
Hot

Today 31 Aug
1. 12 am
2. 1 am
3. 2 am
4. 3 am
5. 4 am
6. 5 am
7. 6 am
8. 7 am
9. 8 am
10. 9 am
11. 10 am
12. 11 am
13. 12 pm
14. 1 pm
15. 2 pm
16. 3 pm
17. 4 pm
18. 5 pm
19. 6 pm
20. 7 pm
21. 8 pm
22. 9 pm
23. 10 pm
24. 11 pm
Tue 1 Sep
1. 12 am
2. 1 am
3. 2 am
4. 3 am
5. 4 am
6. 5 am
7. 6 am
8. 7 am
9. 8 am
10. 9 am
11. 10 am
12. 11 am
13. 12 pm
14. 1 pm
15. 2 pm
16. 3 pm
17. 4 pm
18. 5 pm
19. 6 pm
20. 7 pm
21. 8 pm
22. 9 pm
23. 10 pm
24. 11 pm
Wed 2 Sep
1. 12 am
2. 1 am
3. 2 am
4. 3 am
5. 4 am
6. 5 am
7. 6 am
8. 7 am
9. 10 am
10. 1 pm
11. 4 pm
12. 7 pm
13. 10 pm
Thu 3 Sep
1. 1 am
2. 4 am
3. 7 am
4. 10 am
5. 1 pm
6. 4 pm
7. 7 pm
Fri 4 Sep
1. 1 am
2. 7 am
3. 1 pm
4. 7 pm
Sat 5 Sep
1. 1 am
2. 7 am
3. 1 pm
4. 7 pm
Sun 6 Sep
1. 1 am
2. 7 am
3. 1 pm
4. 7 pm

Today 31 Aug Hays

Sunny. Highs in the upper 90s. Southeast Winds 5 to 10 Mph. Highest heat index Readings up to 105.

Tonight 31 Aug Hays

Mostly clear. Lows in the mid 70s. Southeast Winds 5 to 10 Mph, becoming south after midnight.

Greater Castle Forest Temperature Statistics

August Temperature

San Marcos, San Marcos Municipal Airport (5.6 miles)

Lowest 27 January, 2026
18 °F
Average 2026
73 °F
Highest 20 August, 2026
102.9 °F
Lowest 10 July, 2026
70 °F
Average July
84.3 °F
Highest 22 July, 2026
102 °F
Lowest 23 August, 2026
69.1 °F
Average August
86.6 °F
Highest 20 August, 2026
102.9 °F

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (5.6 miles)

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Average Low 2021–2026
60.1 °F
Average 2021–2026
70.9 °F
Average High 2021–2026
82.6 °F

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Greater Castle Forest Weather Forecast

Today 31 Aug Hays

Tonight 31 Aug Hays

Tue 1 Sep Hays

Tue 1 Sep Hays

Wed 2 Sep Hays

Wed 2 Sep Hays

Thu 3 Sep Hays

Thu 3 Sep Hays

Fri 4 Sep Hays

Fri 4 Sep Hays

Sat 5 Sep Hays

Sat 5 Sep Hays

Sun 6 Sep Hays

Sun 6 Sep Hays

Temperature Forecast NOAA

Temperature Real-Time

San Antonio Radar

National Satellite

National Synoptic

Greater Castle Forest Temperature Statistics

August Temperature

San Marcos, San Marcos Municipal Airport (5.6 miles)

Lowest 27 January, 2026

Average 2026

Highest 20 August, 2026

Lowest 10 July, 2026

Average July

Highest 22 July, 2026

Lowest 23 August, 2026

Average August

Highest 20 August, 2026

Climate (2021–2026)

San Marcos, San Marcos Municipal Airport (5.6 miles)

Average Low 2021–2026

Average 2021–2026

Average High 2021–2026